When I hit the gas it almost sounds like a baseball card in bike spokes? Seems to be exhaust issue. any ideas? thanks

The catalytic converter may be coming apart. Try unbolting it in front of the converter if it stops buy a new one. Spray the bolts with P-B Blaster the night before checking. I have drilled out the broken stud and used new nuts and bolts. I recently broke one on my vehicle and heated it up cherry red and used vice grips to remove.
With the vehicle on jack stands use a long screwdriver and listen. The metal against the converter the plastic against your ear. If its loud you certainly hear it with the engine running.

If it's an exhaust leak you should be able to hear it better when someone covers the exhaust pipe with their hand.

Figure you'd want to locate the leak more clearly before you start unbolting things. (not that rhandwor is wrong)